Answer:
What demands an answer, but asks no question?
Hot tempered and sometimes it blows its top, making a mess of everything.
What goes up but never comes down?
I am your mother's brother's only brother in law. Who am I?
I am not alive, though I never die, to no one I've ever told a lie, today I can be god's warrior, and serve him with no horror, but tomorrow I might be devil's knight, for I am what ends the light.
I'm the source of all emotion but I'm caged in a white prison.